Patent US3637442A successfully refreshed from Google Patents.
US3637442A
Expired / Lapsed
US
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Process for producing plastically deformed iron-rhodium base alloy bodies
Assignee: General Electric Co
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Filing: 1967-02-13
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Granted: 1972-01-25
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Expires: 1987-02-13
Abstract
Abstract This invention concerns a new process for producing plastically deformed shapes of iron-rhodium base alloys which exhibit controlled magnetic transitions. The process comprises hot and cold reducing a starting body to some final dimension, the cold reduction causing an increase in the ductility of the starting body by partially rendering it crystallographically face-centered cubic, and then heat treating the final body at a temperature no lower than about 235* C. to produce a CsC1-type ordered crystal structure having an abrupt magnetic transition. Subsequent cold reducing of the heat-treated body by varying amounts alters the nature of the magnetic transition.
Inventors
- 👤 James S Kouvel
- 👤 James M Lommel
- 👤 Thomas E Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:55
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
19 words
A process as defined in claim 1 wherein the hot and cold reduction is accomplished by forging and rolling.
Claim 2
Dependent Claim
22 words
A process as defined in claim 1 wherein the hot reduction is effected at temperatures ranging from about 850* to 1,000* C.
Claim 3
Dependent Claim
25 words
A process as defined in claim 1 wherein the heat treatment of the cold-reduced alloy is effected at temperatures no lower than about 235* C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |